and Ken White for their many comments, suggestions, and assistance with data. The insightful comments of two referees led to a significant improvement of this paper, including the addition of Appendix II. The content this paper is the responsibility of the author, and should not be attributed to Inland Revenue New Zealand, which financed this study. The author's related papers on the hidden eco...

During the last two decades enhanced multiple use of underground resources and space led to a growing number issues which current European Union (EU) and/or its Member States (MS) national legal regulatory frameworks knowledge bases are not able manage efficiently, from sustainable development perspective. With focus on Europe, this study is horizon scanning review raise awareness situation hig...

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